Switzerland · Canton SO · District
Bezirk Wasseramt
SolothurnBezirk Wasseramt is one of 10 districts of the canton of Solothurn and comprises 17 municipalities with 54'436 residents in all (BFS, 2025). A district is an administrative unit of the canton — a court and administrative area, not a postal delivery area: postal codes and localities follow delivery routes and can cross district borders.
Zuchwil
9'622Residents
Biberist
9'531Residents
Derendingen
7'219Residents
Gerlafingen
5'859Residents
Luterbach
3'756Residents
Subingen
3'311Residents
Lohn-Ammannsegg
2'940Residents
Deitingen
2'409Residents
Recherswil
2'260Residents
Kriegstetten
1'456Residents
Aeschi
1'342Residents
Obergerlafingen
1'232Residents
Etziken
1'093Residents
Horriwil
940Residents
Drei Höfe
727Residents
Bolken
579Residents
Hüniken
160Residents
Federal Statistical Office (FSO), retrieved 12.08.2026
Votes in Bezirk Wasseramt
district results as published by BFS14.06.2026Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)Federal● Accepted · 52.5% Yes
54.5% YesNo 45.5%
14.06.2026Volksinitiative «Keine 10-Millionen-Schweiz! (Nachhaltigkeitsinitiative)»Federal● Rejected · 45.2% Yes
50.5% YesNo 49.5%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% Yes
58.2% YesNo 41.8%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% Yes
58.4% YesNo 41.6%
08.03.2026Volksinitiative «Für eine gerechte Energie- und Klimapolitik: Investieren für Wohlstand, Arbeit und Umwelt (Klimafonds-Initiative)»Federal● Rejected · 29.3% Yes
24.0% YesNo 76.0%
08.03.2026Volksinitiative «200 Franken sind genug! (SRG-Initiative)»Federal● Rejected · 38.1% Yes
40.5% YesNo 59.5%
08.03.2026Bargeldinitiative und Gegenvorschlag: StichfrageFederal● Rejected · 37.4% Yes
39.9% YesNo 60.1%
08.03.2026Bundesbeschluss über die schweizerische Währung und die Bargeldversorgung (Gegenvorschlag zur Bargeldinitiative)Federal● Accepted · 73.4% Yes
71.8% YesNo 28.2%
08.03.2026Volksinitiative «Ja zu einer unabhängigen, freien Schweizer Währung mit Münzen oder Banknoten (Bargeld ist Freiheit)»Federal● Rejected · 45.6% Yes
45.8% YesNo 54.2%
Federal Statistical Office (FSO), retrieved 12.08.2026
Politics
National Council election 2023 · sum of its municipalitiesSVP30.1% · strongest party
SVP30.1%
SP20.9%
FDP17.0%
Mitte14.3%
GRÜNE8.5%
GLP6.1%
Übrige1.7%
EVP1.4%
Tax rate in the district
ESTV 2026Lohn-Ammannsegg
104 %
median of its municipalities
123 %
Bolken
145 %
A district has no tax rate of its own. Rates range from 104 % % in Lohn-Ammannsegg to 145 % % in Bolken (median 123 % %).
Tax burden (single, CHF 100,000): 15.6 % in Lohn-Ammannsegg to 18.4 % in Bolken (ESTV 2'026)
Housing
BFSVacancy rate
1.93 %
Dwellings
26'724
Avg. rooms
3.8
Built before 1946
18.4%
Vacancy rate: published by BFS for the district (2025) · Dwellings: sum of its municipalities (2024)
Population change
BFS · 2025 · sum of its municipalitiesPopulation change 2025
+227 +0.4%
births
483
deaths
458
net migration
+248
BEVNAT (Statistik der natürlichen Bevölkerungsbewegung) 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026
Economy
BFS · 2024 · sum of its municipalitiesJobs
23'012
Workplaces
2'751
Services share
68.1 %
Jobs by sector: Primary 408 (1.8%) · Secondary 6'909 (30.0%) · Tertiary 15'669 (68.1%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 11.09.2026
Agriculture
BFS · 2025 · sum of its municipalitiesFarms
132
Organic share
7.6 %
Farmland
3'167 ha
Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026
Climate · Terrain
MeteoSchweiz · swisstopoAnnual mean temperature
9.4 °C
Precipitation
1'090 mm
Elevation
417–595 m
Flat share
88.8%
Climate: area-weighted over its municipalities · Terrain: swissALTIRegio 40 m, zonal over the district polygon
Energy · Accessibility
BFE · ElCom · ARESolar potential
444 GWh
Electricity
26.2 Rp./kWh
Public transport to centre
64 min
Road to centre
38 min
Solar potential: sum of its municipalities · Electricity: median of its municipalities (24.691–30.155 Rp./kWh, 2027). ElCom publishes a median per municipality; the district value is our median of those. · Accessibility: median of its municipalities
Where the municipalities of Bezirk Wasseramt rank
sum of its municipalities3365Grasswil×24500Solothurn×34528Zuchwil4542Luterbach4543Deitingen×24552Derendingen4553Subingen4554Etziken +14556Aeschi SO +1×24557Horriwil4558Hersiwil4562Biberist4563Gerlafingen4564Obergerlafingen×24565Recherswil4566Kriegstetten4573Lohn-Ammannsegg×24574Lüsslingen×3
7 of these postal codes reach across the district border.
Map
swisstopo · OSM- Which municipalities belong to Bezirk Wasseramt?
- Bezirk Wasseramt comprises 17 municipalities: Zuchwil, Biberist, Derendingen, Gerlafingen, Luterbach, Subingen, Lohn-Ammannsegg, Deitingen, Recherswil, Kriegstetten, Aeschi, Obergerlafingen, Etziken, Horriwil, Drei Höfe, Bolken, Hüniken. Together they have 54'436 residents (BFS, 2025).
- Which canton is Bezirk Wasseramt in?
- Bezirk Wasseramt lies in the canton of Solothurn, which is divided into 10 districts.
- How many people live in Bezirk Wasseramt?
- Bezirk Wasseramt has 54'436 residents (BFS STATPOP, 2025) — the sum of its 17 municipalities; the largest is Zuchwil with 9'622.
- Does Bezirk Wasseramt have its own tax rate?
- No. Tax rates are set by municipalities. In Bezirk Wasseramt the municipal rate ranges from 104 % (Lohn-Ammannsegg) to 145 % (Bolken).
- How did Bezirk Wasseramt vote in the latest federal vote?
- On 14.06.2026, Bezirk Wasseramt voted 54.5 % yes on “Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)” (Accepted) — the district figure BFS publishes.
Districts exist in 17 cantons; UR, OW, NW, GL, ZG, BS, AI, NE and GE have no such level.